Circuit board high temperature carrier film and its manufacturing method[technical field]
The present invention relates to laminar products, more particularly to the laminar product being actually made of synthetic resin, more particularly to resistance toWhat high temperature and acid and alkali-resistance required carries membrane structure for the high temperature on printed circuit board, and the invention further relates to the high temperature to holdThe manufacturing method of film carrier structure.
[background technique]
With the rapid development of electronic circuit industry, flexible circuit board (referred to as FPC) is more next in the application of terminal electronic productIt is more extensive.The consumer electronics products such as smart phone and wearable device increase very fast, automotive automation, networking in recent yearsChange and motorized also greatly have stimulated the vehicle-mounted market demand, product just develops towards the direction of lighting and miniaturization.ByIn the difference of material property, traditional printed circuit board (PCB) can no longer meet the requirement of product, the technology of the artPersonnel seek to break through on material and technique always, and FPC is becoming electronic equipment as most popular technology among theseMain connection accessory.
Flexible circuit board is that have a height reliability using polyimides or polyester film as one kind made of substrate, it is excellent canFlexible printed circuit board, has the characteristics that Distribution density is high, light-weight, thickness is thin and flexible is good, flexible circuit board letterClaim soft board or FPC.However, the thinner thickness and flexibility just because of FPC are preferable, it is caused to hold during processingEasily there is the problem of fold and curling.Currently, the solution that the art compares mainstream is increased in FPC production processAdd a small process, stick one layer of protective film protected with reinforcing support and plate face, which can relatively efficiently avoid outThe phenomenon that existing fold and curling.
But since FPC processing procedure is complicated, production process needs to impregnate by high temperature and acid-base solution, and the prior art is protectedCuticula is generally easy to appear the problems such as residue glue, viscosity are excessive and/or acid-base solution permeates, this will greatly promote the report of FPC productUseless rate, increases production cost.
Prior art protective film mainly uses double-layer structure, they have the following deficiencies:
One, after high-temperature laminating and baking, FPC plate face is easy to appear residue glue, after being adhered to substrate surface, it is very difficult to clean thoroughBottom；
Two, after acid-base solution impregnates, protective film is easy to produce bubble and then acid-base solution infiltration problem occurs, and solution is to productionProduct surface quality can have an impact.
Therefore, the resistance to height that a printed circuit board (PCB) for being suitable for single side is especially flexible circuit board (FPC) is developedThe protective film of warm acid and alkali-resistance has far-reaching significance.
[summary of the invention]
The technical problem to be solved in the present invention is that it is high to provide a kind of circuit board in place of avoiding above-mentioned the deficiencies in the prior artWarm carrier film and its manufacturing method, have many advantages, such as high temperature resistant, without residue glue, viscosity it is moderate and without acid-base solution permeate.
The present invention solve the technical problem the technical solution adopted is that:
A kind of manufacturing method of circuit board high temperature carrier film is provided, the circuit board is successively wrapped from top to bottom with high temperature carrier filmThe single-sided parting film of release effect has been included, the acrylate glue-line of bonding and protective effect is played and has played the PET base material of carryingLayer；The manufacturing method of circuit board high temperature carrier film the following steps are included:
Step A selects PET base material resistant to high temperature as PET base material layer；
Step B selects acrylic adhesive to match material of the liquid as acrylate glue-line, and acrylic adhesive is applied with liquid
Cloth forms acrylate glue-line in the PET base material layer；Formula and manufacturing method of the acrylic adhesive with liquid are such asUnder: it according to mass fraction, takes 90~110 parts of acrylic adhesive to be put into a container, then pours into can dissolve in this embodiment10~30 parts of the retarder thinner of acrylic adhesive, is sufficiently mixed until being completely dispersed；Line style can be made by being put into another containerOr slight branched chain type macromolecular is transformed into 1.0~4.0 parts of curing agent of tridimensional network, then pours into another container10~40 parts of retarder thinner of dissolving cured dose of energy, are sufficiently mixed until being completely dispersed；Finally by the mixture in two containersIt is mutually mixed sufficiently, guarantees to be completely dispersed, be subsequently added into 3.0~13.0 parts of plasticizer, be sufficiently mixed until being completely dispersed；
The layer upper surface of acrylate glue-line and single-sided parting film in step B is combined with each other, thus by step C
Form the high temperature carrier film of three-decker；
Curing: step D the high temperature carrier film in step C is put into the curing room of certain temperature and stores certain time, has been obtainedHigh temperature carrier film after well doneization.
The roughness Ra value of the PET base material layer upper and lower surface is 0.01~0.2 μm (micron), the surface of upper and lower surfaceTension value is 48~60dyn/cm(dynes per centimeter), the percent thermal shrinkage MD(mechanical stretching direction at 180 DEG C) and TD(it is verticalIn the direction of stretching) it is respectively less than 0.5%.
The off-type force of the single-sided parting film is 5~30g/inch(gram/inchs).
The single-sided parting film with a thickness of 25~75 μm；The acrylate glue-line with a thickness of 8~20 μm；It is describedPET base material layer with a thickness of 25~75 μm.
The plasticizer can reduce the elasticity modulus of the melting viscosity of mixture, glass transition temperature and elastomer, increaseThe elongation and reduction tensile strength of mixture, the plasticizer includes trioctyl trimellitate (TOTM), n-butyl sebacate, fatRace's binary acid esters, Phthalates, benzene polyacid esters, benzoates, polyalcohol esters, chlorinated hydrocarbons, epoxies, lemonOne of lemon esters of gallic acid, polyesters are a variety of.
The acrylic adhesive matches the formula and manufacturing method of liquid further include: and 1.0~4.0 parts of inhibitor, by the inhibitionAgent is added and is sufficiently mixed until being completely dispersed.The inhibitor is the substance for blocking or reducing chemical reaction velocity, packetInclude acetylacetone,2,4-pentanedione.
The acrylic adhesive matches the formula and manufacturing method of liquid further include: 0.5~5.0 part of mill base, the mill base is addedEnter and is sufficiently mixed until being completely dispersed.
The present invention also provides a kind of circuit board high temperature carrier films, are used for printed circuit board, especially for softProperty circuit board, the circuit board high temperature carrier film from top to bottom successively include play the role of release single-sided parting film, playIt bonds the acrylate glue-line with protective effect and plays the role of the PET base material layer of carrying；It is coated with using acrylic adhesive with liquidAcrylate glue-line is formed in the PET base material layer, the layer upper surface of the acrylate glue-line and the single-sided parting film is multipleIt is combined；Formula of the acrylic adhesive with liquid includes: 90~110 parts of acrylic adhesive, can dissolve acrylic adhesive10~30 parts of retarder thinner, 1.0~4.0 parts of curing agent, 10~40 parts of retarder thinner of dissolving cured dose of energy, plasticizer 3.0~13.0 parts, above-mentioned component is mass fraction.
Compared with the existing technology compared with circuit board of the present invention is with the beneficial effect of high temperature carrier film and its manufacturing method:
One, the material of the acrylate glue-line of high temperature carrier film of the present invention uses the special formulation of addition plasticizer, and suitableGround control plasticizer deal, to improve the impact strength of acrylate glue-line, and reduce acrylate glue-line material thisThe elasticity modulus of the melting viscosity of a mixture, glass transition temperature and elastomer, increasing the material of acrylate glue-line, this is poly-Close the elongation of object, reduce tensile strength, thus can effectively improve the soda acid infiltration after this protective film fitting of high temperature carrier film,The defects of bubble and residue glue, plays the role of high temperature resistant, bonding and protection;
Two, after high-temperature laminating and baking, so that high temperature carrier film viscosity of the present invention is climbed small, the plate face of circuit board is for exampleFPC plate face ensure that the quality of product without residue glue and the problems such as warpage；
Three, after acid-base solution impregnates, it is firm that high temperature carrier film of the present invention is bonded with FPC plate face, bubble-free and acid-base solutionThe problems such as infiltration, it is therefore prevented that FPC product surface is by acid and alkali corrosion；
In summary, circuit board of the present invention with high temperature carrier film have high temperature resistant, without residue glue, viscosity it is moderate and without acid-base solution seepThe advantages that saturating.
[Detailed description of the invention]
Fig. 1 is the orthographic projection main cross-sectional schematic diagram of circuit board high temperature carrier film of the present invention；
Fig. 2 is various embodiments of the present invention and the properties of product test table that comparative example preparation is completed.
[specific embodiment]
Below with reference to each attached drawing, invention is further described in detail.
Referring to Fig. 1, a kind of manufacturing method of circuit board high temperature carrier film, the circuit board with high temperature carrier film on toUnder successively included the single-sided parting film 10 of release effect, play bonding and the acrylate glue-line 20 of protective effect and play carrying and makePET base material layer 30；The manufacturing method of circuit board high temperature carrier film the following steps are included:
Step A selects PET base material resistant to high temperature as PET base material layer 30；PET is English PolyethyleneThe abbreviation of terephthalate, Chinese mean " polyethylene terephthalate "；The actually described PET base material layer 30Material is polyethylene terephthalate (PET)；
Step B selects acrylic adhesive to match material of the liquid as acrylate glue-line 20, and acrylic adhesive is applied with liquid
Cloth forms acrylate glue-line 20 in the PET base material layer 30；Formula and manufacturer of the acrylic adhesive with liquidMethod is as follows: according to mass fraction, taking 90~110 parts of acrylic adhesive to be put into a container, then pours into energy in this embodiment10~30 parts of retarder thinner of acrylic adhesive are dissolved, are sufficiently mixed until being completely dispersed；Being put into another container can makeLine style or slight branched chain type macromolecular are transformed into 1.0~4.0 parts of curing agent of tridimensional network, then in another containerCan be dissolving cured dose 10~40 parts of retarder thinner are poured into, are sufficiently mixed until being completely dispersed；It finally will be mixed in two containersIt closes object to be mutually mixed sufficiently, guarantees to be completely dispersed, be subsequently added into 3.0~13.0 parts of plasticizer, be sufficiently mixed until being completely dispersed,The mixture eventually formed is exactly the acrylic adhesive with liquid, actually a kind of new adhesive；The method of coating isThe prior art, details are not described herein；
Step C, by step B acrylate glue-line 20 and the layer upper surface of single-sided parting film 10 be combined with each other,
Material is thus formed the high temperature carrier films of three-decker；Compound method is also the prior art, is also repeated no more herein；
Curing: step D the high temperature carrier film in step C is put into the curing room of certain temperature and stores certain time, has been obtainedHigh temperature carrier film after well doneization.
High temperature described in the present invention refers to that temperature is 180 DEG C~220 DEG C.
Referring to Fig. 1, the roughness Ra value of 30 upper and lower surface of PET base material layer is 0.01~0.2 μm (micron), onThe surface tension value on lower two sides is 48~60dyn/cm(dynes per centimeter), the mechanical stretching side percent thermal shrinkage MD(at 180 DEG CTo) and TD(perpendicular to stretching direction) be respectively less than 0.5%.
Referring to Fig. 1, the off-type force of the single-sided parting film 10 is 5~30g/inch(gram/inchs).
Referring to Fig. 1, the single-sided parting film 10 with a thickness of 25 μm~75 μm (micron)；The acrylate glue-line 20With a thickness of 8~20 μm (microns)；The PET base material layer 30 with a thickness of 25 μm~75 μm (micron).
Formula and manufacturing method of the acrylic adhesive with liquid may also is that according to mass fraction, take acrylic adhesive90~110 parts are put into a container, then pour into can dissolve 10~30 parts of retarder thinner of acrylic adhesive in this embodiment,It is sufficiently mixed until being completely dispersed；It is put into 1.0~4.0 parts of curing agent in another container, then is fallen in another containerEnter can be dissolving cured dose 10~40 parts of retarder thinner, is sufficiently mixed until being completely dispersed；Finally by the mixing in two containersObject is mutually mixed sufficiently, guarantees to be completely dispersed, and is subsequently added into 3.0~13.0 parts of plasticizer, is sufficiently mixed until being completely dispersed, thenIt is added 0.5~5.0 part of mill base, and is sufficiently mixed until being completely dispersed.
Either, formula and manufacturing method of the acrylic adhesive with liquid are as follows: according to mass fraction, taking acrylic acid90~110 parts of ester gum are put into a container, then pour into this embodiment can dissolve the retarder thinner 10 of acrylic adhesive~It 30 parts, is sufficiently mixed until being completely dispersed；1.0~4.0 parts of curing agent are put into another container, then in another containerIn pour into can 10~40 parts of retarder thinner of dissolving cured dose, be sufficiently mixed until being completely dispersed；It finally will be in two containersMixture is mutually mixed sufficiently, guarantees to be completely dispersed, and is subsequently added into 3.0~13.0 parts of plasticizer, is sufficiently mixed until dividing completelyIt dissipates, adds 1.0~4.0 parts of inhibitor, and be sufficiently mixed until being completely dispersed.
Either, formula and manufacturing method of the acrylic adhesive with liquid are as follows: according to mass fraction, taking acrylate90~110 parts of glue are put into a container, then pour into the retarder thinner 10~30 that can dissolve acrylic adhesive in this embodimentPart, it is sufficiently mixed until being completely dispersed；1.0~4.0 parts of curing agent are put into another container, then in another containerCan be dissolving cured dose 10~40 parts of retarder thinner are poured into, are sufficiently mixed until being completely dispersed；It finally will be mixed in two containersIt closes object to be mutually mixed sufficiently, guarantees to be completely dispersed, be subsequently added into 3.0~13.0 parts of plasticizer, be sufficiently mixed until being completely dispersed,1.0~4.0 parts of inhibitor are added, and is sufficiently mixed until being completely dispersed, finally adds 0.5~5.0 part of mill base, and sufficientlyMixing is until being completely dispersed.
The acrylic adhesive is two-liquid type acrylate adhesive, plays heatproof, bonding and protective effect；Retarder thinnerIt is a kind of liquid that can dissolve solid, liquid or gaseous solute, its effect is to dilute and dissolve acrylate or isocyanic acidEsters provide reaction environment, and retarder thinner includes toluene, isopropanol, ethyl acetate and/or butanone, i.e. retarder thinner includes firstOne of benzene, isopropanol, ethyl acetate, butanone are a variety of；Curing agent is isocyanates, it can make line style or slight branchThe macromolecular of type is transformed into tridimensional network, and curing agent includes toluene di-isocyanate(TDI) (TDI), isophorone diisocyanate(IPDI), methyl diphenylene diisocyanate (MDI), dicyclohexyl methyl hydride diisocyanate (HMDI), two isocyanide of hexa-methyleneOne of acid esters (HDI), lysine diisocyanate (LDI) are a variety of；Plasticizer includes trioctyl trimellitate (TOTM), decanedioic acidDi-n-butyl, aliphatic dibasic acid ester, Phthalates, benzene polyacid esters, benzoates, polyalcohol esters, chlorinationOne of hydro carbons, epoxies, citric acid ester type, polyesters are a variety of, and wherein Phthalates include phthalic acid esterClass or terephthalic acid ester, plasticizer can reduce the springform of the melting viscosity of mixture, glass transition temperature and elastomerAmount increases the elongation of polymer, reduces tensile strength；Inhibitor includes acetylacetone,2,4-pentanedione, it is that one kind is used to block or reduceThe substance of chemical reaction velocity acts on identical as anticatalyst；Mill base is organic resin paint vehicle, glue system can be deployedAt required color effect, it has the characteristics that, and strong covering power, weatherability are excellent, protect light and protect color.
If the acrylic adhesive only adds curing agent with liquid and obtains this guarantor of modified high temperature carrier film obtainedCuticula, room temperature viscosity can satisfy the requirement of FPC process, but since its colloid hardness is bigger than normal, be easy to cause fittingOr occurs the problem of blistering and residue glue after high temperature.And plasticizer can be effectively reduced acrylic adhesive with this glue of liquidThe hardness and elastic modulus of glutinous agent, and increase elongation at break, flexibility and plasticity etc. performance.It therefore, is improvement thirdOlefin(e) acid ester gum matches the brittleness of this adhesive cured glue layer of liquid, and the present invention is by addition plasticizer modified formula, to improve thirdThe impact strength of olefin(e) acid ester gum layer, to can effectively improve bubble and residue glue after this protective film fitting of high temperature carrier film etc.Defect.Plasticization effect of the acrylic adhesive with liquid this adhesive is since the high-polymer molecule interchain aggtegation is cut in materialIt is weak and caused by；In reaction process, plasticizer molecule is inserted into polymer molecule interchain, weakens drawing for polymer molecule interchainPower increases the mobility of polymer molecular chain, reduces the crystallinity of polymer molecular chain, so that the plasticity of polymer be made to increaseBy force.
Referring to Fig. 1, the present invention also provides a kind of circuit board high temperature carrier films, are used for printed circuit board, especiallyIt is for flexible circuit board (FPC), the circuit board high temperature carrier film successively includes playing the role of release list from top to bottomFace release film 10, the acrylate glue-line 20 for playing the role of bonding and protective effect and the PET base material layer 30 for playing carrying；UsingAcrylic adhesive is coated in the PET base material layer 30 formation acrylate glue-line 20 with liquid, the acrylate glue-line 20 withThe layer upper surface of the single-sided parting film 10 is combined with each other；Formula of the acrylic adhesive with liquid includes: acrylic adhesive 90~110 parts, 10~30 parts of retarder thinner of acrylic adhesive can be dissolved, 1.0~4.0 parts of curing agent, can be dissolving cured dose it is dilute10~40 parts of solvent are released, 3.0~13.0 parts of plasticizer, above-mentioned component is mass fraction.
Embodiment one
Referring to Fig. 1, a kind of manufacturing method of circuit board high temperature carrier film, comprising the following steps:
Step A selects PET base material resistant to high temperature as PET base material layer 30；The roughness of 30 upper and lower surface of PET base material layerRa value is 0.1 μm, and the surface tension value of upper and lower surface is 54dyn/cm, the mechanical stretching side percent thermal shrinkage MD(at 180 DEG CTo) it is 0.2%, direction of the percent thermal shrinkage TD(perpendicular to stretching at 180 DEG C) it is 0.3%；The PET base material layer 30 with a thickness of50μm；
Step B, selects acrylic adhesive to match material of the liquid as acrylate glue-line 20, and the acrylic adhesive is matched
The formula of liquid and manufacturing method are as follows: according to mass fraction, taking acrylic adhesive (such as the Industrial Co., Ltd. of Guangdong Chinese mugwortThe AD-6901T of production) 100 parts be put into a container, then pour into this embodiment can dissolve acrylic adhesive dilution it is molten25 parts of agent (such as toluene), is sufficiently mixed until being completely dispersed；Be put into another container curing agent (such as Guangdong Chinese mugwort realityThe FY-85 of industry Co., Ltd production) 3.0 parts, then the retarder thinner (example that can dissolve the curing agent is poured into another containerSuch as toluene) 30 parts, it is sufficiently mixed until being completely dispersed；Finally the mixture in two containers is mutually mixed sufficiently, has been guaranteedFull dispersion is finally added 3.5 parts of plasticizer (such as n-butyl sebacate of Suzhou Chen Ying new material Co., Ltd production), is filledDivide mixing, guarantee to be completely dispersed, thus obtains the acrylic adhesive of the present embodiment with liquid；The acrylic adhesive is matched into liquidIt is coated in the PET base material layer 30 by coating machine, toasts 60 seconds~150 seconds and be formed by curing at 100 DEG C~140 DEG C of temperatureAcrylate glue-line 20, such as toasted 100 seconds at 120 DEG C of temperature and be formed by curing acrylate glue-line 20；The acrylateGlue-line 20 with a thickness of 10 μm；
Step C, by step B acrylate glue-line 20 and the layer upper surface of single-sided parting film 10 be combined with each other；
The single-sided parting film 10 with a thickness of 25 μm, the off-type force of the single-sided parting film 10 is 15g/inch；
Material is thus formed the high temperature carrier films of three-decker；
Step D, curing: the high temperature carrier film in step C being put into the curing room that temperature is 25 DEG C and is stored 168 hours, orHigh temperature carrier film in step C is put into the curing room that temperature is 45 DEG C and is stored 48 hours, the high temperature after obtaining curing completelyCarrier film.
Embodiment two
Referring to Fig. 1, the present embodiment and the manufacturing method step of embodiment one are essentially identical, the difference is that single-sided parting film10, acrylate glue-line 20 and the material of PET base material layer 30 are slightly different, and the manufacturing method of the present embodiment is specific as follows:
Step A selects PET base material resistant to high temperature as PET base material layer 30；The roughness of 30 upper and lower surface of PET base material layerRa value is 0.08 μm, and the surface tension value of upper and lower surface is 58dyn/cm, the percent thermal shrinkage MD(mechanical stretching at 180 DEG CDirection) it is 0.2%, direction of the percent thermal shrinkage TD(perpendicular to stretching at 180 DEG C) it is 0.3%；The thickness of the PET base material layer 30It is 75 μm；
Step B, selects acrylic adhesive to match material of the liquid as acrylate glue-line 20, and the acrylic adhesive is matched
The formula of liquid and manufacturing method are as follows: according to mass fraction, taking acrylic adhesive (such as the Industrial Co., Ltd. of Guangdong Chinese mugwortThe AD-6901T of production) 100 parts be put into a container, then pour into this embodiment can dissolve acrylic adhesive dilution it is molten25 parts of agent (such as toluene), is sufficiently mixed until being completely dispersed；Be put into another container curing agent (such as Guangdong Chinese mugwort realityThe FY-85 of industry Co., Ltd production) 2.0 parts, then the retarder thinner (example that can dissolve the curing agent is poured into another containerSuch as toluene) 30 parts, it is sufficiently mixed until being completely dispersed；Then the mixture in two containers is mutually mixed sufficiently, has been guaranteedPlasticizer (such as trioctyl trimellitate (TOTM) of Dongguan City Chen Long Chemical trade Co., Ltd production) 3.0 is then added in full dispersionPart, it is sufficiently mixed, guarantees to be completely dispersed, finally add 2.0 parts of inhibitor (such as acetylacetone,2,4-pentanedione), be sufficiently mixed, guarantee completeDispersion has thus obtained the acrylic adhesive of the present embodiment with liquid；The acrylic adhesive is coated with liquid by coating machineIn the PET base material layer 30, is toasted 60 seconds~150 seconds at 100 DEG C~140 DEG C of temperature and be formed by curing acrylate glue-line20, such as toasted 100 seconds at 120 DEG C of temperature and be formed by curing acrylate glue-line 20；The thickness of the acrylate glue-line 20It is 10 μm；
Step C, by step B acrylate glue-line 20 and the layer upper surface of single-sided parting film 10 be combined with each other；
The single-sided parting film 10 with a thickness of 50 μm, the off-type force of the single-sided parting film 10 is 15g/inch；
Material is thus formed the high temperature carrier films of three-decker；
Step D, curing: the high temperature carrier film in step C being put into the curing room that temperature is 25 DEG C and is stored 168 hours, orHigh temperature carrier film in step C is put into the curing room that temperature is 45 DEG C and is stored 48 hours, the high temperature after obtaining curing completelyCarrier film.
Embodiment three
Referring to Fig. 1, the present embodiment and the manufacturing method step of embodiment one are essentially identical, the difference is that single-sided parting film10, acrylate glue-line 20 and the material of PET base material layer 30 are slightly different, and the manufacturing method of the present embodiment is specific as follows:
Step A selects PET base material resistant to high temperature as PET base material layer 30；The roughness of 30 upper and lower surface of PET base material layerRa value is 0.2 μm, and the surface tension value of upper and lower surface is 54dyn/cm, the mechanical stretching side percent thermal shrinkage MD(at 180 DEG CTo) it is 0.2%, direction of the percent thermal shrinkage TD(perpendicular to stretching at 180 DEG C) it is 0.3%；The PET base material layer 30 with a thickness of50μm；
Step B, selects acrylic adhesive to match material of the liquid as acrylate glue-line 20, and the acrylic adhesive is matched
The formula of liquid and manufacturing method are as follows: according to mass fraction, taking acrylic adhesive (such as the Industrial Co., Ltd. of Guangdong Chinese mugwortThe AD-6901T of production) 100 parts be put into a container, then pour into this embodiment can dissolve acrylic adhesive dilution it is molten25 parts of agent (such as toluene), is sufficiently mixed until being completely dispersed；Be put into another container curing agent (such as Guangdong Chinese mugwort realityThe FY-85 of industry Co., Ltd production) 2.0 parts, then the retarder thinner (example that can dissolve the curing agent is poured into another containerSuch as toluene) 30 parts, it is sufficiently mixed until being completely dispersed；Then the mixture in two containers is mutually mixed sufficiently, has been guaranteedPlasticizer (such as trioctyl trimellitate (TOTM) of Dongguan City Chen Long Chemical trade Co., Ltd production) 3.0 is then added in full dispersionPart, it is sufficiently mixed, guarantees to be completely dispersed, then add 2.0 parts of inhibitor (such as acetylacetone,2,4-pentanedione), be sufficiently mixed, guarantee divides completelyIt dissipates, finally adds 3.0 parts of mill base (such as ML- blue -816 of Dongguan City Yu Kai packaging material Co., Ltd production), it is sufficiently mixedIt closes, guarantees to be completely dispersed, thus obtained the acrylic adhesive of the present embodiment with liquid；The acrylic adhesive is passed through with liquidCoating machine is coated in the PET base material layer 30, is toasted 60 seconds~150 seconds at 100 DEG C~140 DEG C of temperature and is formed by curing propyleneAcid esters glue-line 20, such as toasted 120 seconds at 120 DEG C of temperature and be formed by curing acrylate glue-line 20；The acrylate glue-line20 with a thickness of 20 μm；
Step C, by step B acrylate glue-line 20 and the layer upper surface of single-sided parting film 10 be combined with each other；
The single-sided parting film 10 with a thickness of 25 μm, the off-type force of the single-sided parting film 10 is 10g/inch；
Material is thus formed the high temperature carrier films of three-decker；
Step D, curing: the high temperature carrier film in step C being put into the curing room that temperature is 25 DEG C and is stored 168 hours, orHigh temperature carrier film in step C is put into the curing room that temperature is 45 DEG C and is stored 48 hours, the high temperature after obtaining curing completelyCarrier film.
Comparative example one
Referring to Fig. 1, the manufacturing method step of this comparative example and embodiment one is essentially identical, the difference is that acrylic adhesiveThe material of layer 20 is slightly different, does not have plasticizer in the material of this comparative example acrylate glue-line 20, specific as follows:
Formula and manufacturing method of the acrylic adhesive with liquid are as follows: according to mass fraction, taking acrylic adhesive (example
The AD-6901T that the Industrial Co., Ltd. to end such as Guangdong produces) 100 parts be put into a container, then fall in this embodiment25 parts of retarder thinner (such as toluene) for entering to dissolve acrylic adhesive, is sufficiently mixed until being completely dispersed；In another containerIn be put into curing agent (such as FY-85 of Industrial Co., Ltd.'s production of Guangdong Chinese mugwort) 3.0 parts, then poured into another container30 parts of the retarder thinner (such as toluene) that the curing agent can be dissolved, is sufficiently mixed until being completely dispersed；It finally will be in two containersMixture be mutually mixed sufficiently, guarantee to be completely dispersed, thus obtained the acrylic adhesive of the present embodiment with liquid.
Comparative example two
Referring to Fig. 1, the manufacturing method step of this comparative example and embodiment one is essentially identical, the difference is that acrylic adhesiveThe material of layer 20 is slightly different, and the deal of plasticizer is relatively how i.e. more excessive in the material of this comparative example acrylate glue-line 20,It is specific as follows:
Formula and manufacturing method of the acrylic adhesive with liquid are as follows: according to mass fraction, taking acrylic adhesive (example
The AD-6901T that the Industrial Co., Ltd. to end such as Guangdong produces) 100 parts be put into a container, then fall in this embodiment25 parts of retarder thinner (such as toluene) for entering to dissolve acrylic adhesive, is sufficiently mixed until being completely dispersed；In another containerIn be put into curing agent (such as FY-85 of Industrial Co., Ltd.'s production of Guangdong Chinese mugwort) 3.0 parts, then poured into another container30 parts of the retarder thinner (such as toluene) that the curing agent can be dissolved, is sufficiently mixed until being completely dispersed；It finally will be in two containersMixture be mutually mixed sufficiently, guarantee to be completely dispersed, finally adding plasticizer, (such as Suzhou Chen Ying new material Co., Ltd is rawThe n-butyl sebacate of production) 20 parts, it is sufficiently mixed, guarantees to be completely dispersed, thus obtained the acrylate of the present embodimentGlue matches liquid.
The properties of product test that the various embodiments described above and comparative example preparation are completed is as follows:
1. room temperature viscosity (25 DEG C): embodiment one is 3~12g/inch(gram/inchs), embodiment two is 3~12g/inch, realApplying example three is 5~12g/inch；Comparative example one is 3~12g/inch, and comparative example two is 5~12g/inch；
2. fpc film face viscosity is climbed (160 DEG C, 2h) after pressing: embodiment one is 10~30g/inch(gram/inchs), embodimentTwo be 5~20g/inch, and embodiment three is 8~30g/inch；Comparative example one be 10~30g/inch, comparative example two be 8~30g/inch；
3. acid-base property is tested: embodiment one is without infiltration, and embodiment two is without infiltration, and embodiment three is without infiltration；Comparative example one is permeated,Comparative example two is without infiltration；
4. residue glue situation: embodiment one to embodiment three is good；Comparative example one and comparative example two are bad;
5. warpage situation: embodiment one to embodiment three is good；Comparative example one and comparative example two are good；
6. bubble situation: embodiment one to embodiment three is good；Comparative example one be it is bad, comparative example two is good.
It is intuitive in order to observe, it can also directly refer to Fig. 2.
Acid-base property experiment: respectively by 310 millimeters * 248 millimeters of each embodiment high temperature carrier film in 310 millimeters × 250 millisIt after being bonded on the FPC plate of rice, impregnates 30 minutes, is observed after taking-up each in the sodium hydroxide of 10% concentration and the sulfuric acid of 10% concentrationWhether embodiment high temperature carrying film surface has Liquid Penetrant.
Residue glue situation: respectively by 310 millimeters * 248 millimeters of each embodiment high temperature carrier film at 310 millimeters × 250 millimetersFPC plate on be bonded after, through too fast press press (180 DEG C, 2 minutes, 120 kilograms), using baking oven baking (160 DEG C, 2 is smallWhen), whether observation fpc film face has adhesive residual after tearing off each embodiment high temperature carrier film, is good if non-adhesive residualGood, it is bad for having adhesive residual then.
Warpage situation: respectively by 310 millimeters * 248 millimeters of each embodiment high temperature carrier film at 310 millimeters × 250 millimetersFPC plate on be bonded after, through too fast press press (180 DEG C, 2 minutes, 120 kilograms), using baking oven baking (160 DEG C, 2 is smallWhen), whether FPC slab warping is measured more than 20 millimeters, is good if FPC slab warping is no more than 20 millimeters, if FPC slab warping is superIt is bad for crossing 20 millimeters then.
Bubble situation: respectively by 310 millimeters * 248 millimeters of each embodiment high temperature carrier film at 310 millimeters × 250 millimetersFPC plate on be bonded after, through too fast press press (180 DEG C, 2 minutes, 120 kilograms), using baking oven baking (160 DEG C, 2 is smallWhen), whether the binding face for observing each embodiment high temperature carrier film has bubble, is that well, it is bad for having bubble if bubble-free.
By above-mentioned each experiment, when being bonded on circuit board of the present invention high temperature carrier film and FPC plate, moderate with viscosity,The infiltration of no acid-base solution, without residue glue, without warpage and the advantages that bubble-free, improve the qualification rate of FPC product, reduce and be produced intoThis.And there is acid-base solution infiltration, has residue glue in comparative example one (not having plasticizer in the material of acrylate glue-line 20)It also will appear acid-base solution infiltration if plasticizer deal is very few with bladdery bad defect, have residue glue and/or had bubbleBad defect；Comparative example one (deal of plasticizer is relatively how i.e. more excessive in the material of acrylate glue-line 20) occursThere is the bad defect of residue glue.
The preferred embodiment of the present invention above described embodiment only expresses, the description thereof is more specific and detailed, but simultaneouslyLimitations on the scope of the patent of the present invention therefore cannot be interpreted as;It should be appreciated that for those of ordinary skill in the artFor, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to guarantor of the inventionProtect range;Therefore, all equivalents and modification done with scope of the invention as claimed, should belong to the claims in the present inventionCovering scope.